关于sharding-jdbc只分表

我的框架 springmvc+mybits

需要干的事情：

pom引入

<!-- 引入sharding-jdbc核心模块 -->
<dependency>
    <groupId>io.shardingjdbc</groupId>
    <artifactId>sharding-jdbc-core</artifactId>
    <version>2.0.3</version>
</dependency>

<dependency>
    <groupId>io.shardingjdbc</groupId>
    <artifactId>sharding-jdbc-core-spring-namespace</artifactId>
    <version>2.0.3</version>
</dependency>

spring 配置

<!-- dbcp数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"
      destroy-method="close">
    <property name="driverClassName" value="${jdbc.driver}"/>
    <property name="url" value="${jdbc.url}"/>
    <property name="username" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>

    <!-- 连接池最大使用连接数 -->
    <property name="maxActive" value="50"/>
    <!-- 初始化连接大小 -->
    <property name="initialSize" value="5"/>
    <!-- 获取连接最大等待时间 -->
    <property name="maxWait" value="30000"/>
    <!-- 连接池最大空闲 -->
    <property name="maxPoolPreparedStatementPerConnectionSize" value="20"/>
    <!-- 连接池最小空闲 -->
    <property name="minIdle" value="3"/>
    <!-- 自动清除无用连接 -->
    <property name="removeAbandoned" value="true"/>
    <!-- 清除无用连接的等待时间 -->
    <property name="removeAbandonedTimeout" value="180"/>
    <!-- 连接属性 -->
    <property name="connectionProperties" value="clientEncoding=UTF-8"/>
    <property name="filters" value="stat"/>
    <!--<property name="proxyFilters">-->
    <!--<list>-->
    <!--<ref bean="stat-filter"/>-->
    <!--<ref bean="log-filter"/>-->
    <!--</list>-->
    <!--</property>-->
</bean>

<!--分表策略，sharding-column这里根据order_id(这列属性不能是String,只能是整型)分表，OrderSingleKeyTableShardingAlgorithm是分表算法-->
<sharding:standard-strategy id="tableShardingStrategy" sharding-column="order_id"
precise-algorithm-class="com.os.buqu.algorithm.OrderSingleKeyTableShardingAlgorithm"/>

<sharding:data-source id="shardingDataSource">
    <!--因为我只有一张表。所以就只需要配置一个dataSource-->
    <sharding:sharding-rule data-source-names="dataSource" default-data-source-name="dataSource">
        <sharding:table-rules>
            <!--logic-tables逻辑表名-->
            <!--actual-data-nodes真实表名-->
            <sharding:table-rule logic-table="demo_order" actual-data-nodes="dataSource.demo_order_0,dataSource.demo_order_1"
                                 table-strategy-ref="tableShardingStrategy"/>
        </sharding:table-rules>
        <sharding:binding-table-rules>
            <!--logic-tables逻辑表名-->
            <sharding:binding-table-rule logic-tables="demo_order"/>
        </sharding:binding-table-rules>
    </sharding:sharding-rule>
</sharding:data-source>

<!-- mybatis的配置文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="shardingDataSource"/>
    <property name="configLocation" value="classpath:config/mybatis-config.xml"/>
    <property name="mapperLocations" value="classpath*:mapper/**/*Mapper.xml"/>
</bean>

<!-- spring与mybatis整合配置，扫描所有dao和所有mapper文件 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.os.buqu.dao"/>
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>

<bean id="transactionManager"
      class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="shardingDataSource"/>
</bean>

分表策略类

import io.shardingjdbc.core.api.algorithm.sharding.PreciseShardingValue;
import io.shardingjdbc.core.api.algorithm.sharding.standard.PreciseShardingAlgorithm;

import java.util.Collection;

public final class OrderSingleKeyTableShardingAlgorithm implements PreciseShardingAlgorithm<Integer> {

    public String doSharding(final Collection<String> availableTargetNames, final PreciseShardingValue<Integer> shardingValue) {
        for (String each : availableTargetNames) {
//根据订单号的尾数分表。0-9
            String value=shardingValue.getValue().toString();
            if (each.endsWith(value.substring(value.length()-1,value.length())+"")) {
                return each;
            }
        }
        throw new UnsupportedOperationException();
    }
}